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Contrast ratio results for Lenovo L220x

Contrast ratio 3636:1
Monitor model Lenovo L220x
Submitted 10 Jun 2008 08:09 CEST, by 201.81.*.*
Camera model Nikon D40
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 5.9 s (Set EV to +1.6)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –5.05 stops   (aim for –2 to –3)
Exposure spread 0.64 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
[open image]
Luminance 287 cd/m2
Luminance spread 24 cd/m2 (2 standard deviations)
Exposure value –1.87 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: -1

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.